Core for molds.



L. c; STEWART & M. A. QUINN.

CORE FOR MOLDS.

APPLICATION FILED NOV. 2. 1914- I 1,161,356. Patented Nov. 23, 1915.

3 SHEETS-SHEET I.

L. C. STEWART & M. A. QUINN.

CORE FOR MOLDS.

APPLICATION FILED NOV.2.1914.

1,161.856. v Patented Nov. 23, 1915.

3 SHEETS-SHEET 2.

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L. C. STEWART & M'. A. QUINN. CORE FOR MOLDS.

APPLICATION FILED NOV. 2 1914.

Patented. Nov. 23, 1915.

3 SHEETS-SHEET 3.

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LYIVLAN O. STEWART .AND MARSHALL A. QUINN, 0F ROANOKE, VIRGINIA.

CORE FOR MOLDS.

Patented Nov. 23, 1915.

Application filed November 2, 1914. Serial No. 869,910.

To all whom it may concern:

Be it known that we, LYMAN G. STEWART and MARSHALL A. QUINN, citizens of 'the United States, residing at Roanoke, in the county of Roanoke and State of Virginia, have invented certain new and useful Improvements in Cores for Molds, of which the following is a specification.

Our invention relates to an improvement in cores for molds for building poured concrete structures, and the object is to provide means for collapsing the core, whereby it can be removed from the mold.

A further object is in the provision of means carried by the core for forming a support for the bond or web between the walls, said means automatically disengaged from the bond upon the collapsing of the core, so that it can be removed therewith.

The invention relates to still other novel features of construction and combination of parts which will be hereinafter more fully pointed out and described in the claims.

In the accompanying drawings: Figure 1 is a perspective view of the core; Fig. 2 is a longitudinal vertical sectional view; Fig. 3 is a transverse vertical sectional view showing the core in position in a wall; Fig. 4: is a detail bottom plan view, showing the manner of maintaining the toggle and lip inposition; Fig. 5 is a perspective view of the toggle connection for fastening the sides of the core together and the lip or bond support which is carried by the core; Fig. 6 is a viewillustrating a portion of the wall with some of the outer part broken away to show the internal construction, and two or more cores in position; and Fig. 7 is a detail sectional view showing the lip or wing in the two positions which it is capable of assuming.

The core is preferably made of four main parts, bent from sheet metal, and constituting two sides. Each side is composed of two members 1 and 2 slidably connected together at their upper and lower edges in any approved form, as for instance, by means of the inturned flanges 3, 3 on the section 1, and overlapping and embracing flanges 4 on section 2, which receive and are slidably connected to the flanges 3. These constitute the sliding and telescopic joints whereby the lengthening and shortening of the core is made both possible and convenient. The ends of the core are formed by the overlapping and inturned edges or flanges 5, 5 of sections 2, and the flanges or edges'6, 6 of section 1. These ends are preferably inclined or tapered from the edge of the core to the other edge, so that the upper edge of the core is longer than the other. The object of this is to form the bond 7 (indicated in Fig. 6) between the adjacent ends of the grooves.

Pivotally mounted on the inner walls of the sides 1 and 2 are rods 8, 8. At each end of the rods a toggle 9 is provided, and the adjacent toggles are connected together by means of pins 10 for forming a toggle joint, so that the toggle at both edges are simultaneously operated by actuating either one. By .moving'the toggles so that they extend practically transverse of the core, the two sides of the core are maintained apart, but when the toggles are forced in another direction, the core will collapse, causing the sides to be drawn toward each other. Right angular guide bars 11, 11 are fastened to the sides 1 and 2 for maintaining the overlapping ends 5, 5 and 6, 6 in proper relation and preventing any possibility of longitudinal movement, as well as preventing the ends from being crushed inwardly.

A hanger or bracket 12 is carried by one of the flanges 5 of the section 2 at one end of thecore, and by the flange 6 of one of the sections 1 at eitherend of the core. This bracket is provided with jaws 13, 13 in which a tongue 14: is received. A pin 15 passes through the jaws 13 and tongue 14. for pivotally connecting the tongue thereto.

The tongue 1% is connected to a wing or lip,

16, which is adapted to extend below the lower edge of the core, and is located so that it projects outwardly at the end of the core. These lips or wings 16 form the support for the bond which is formed between the ad j acent cores, the bonds being formed as indicated in Fig. 6. The wings 16 are swung outwardly so that when the toggles are swung to their transverse position, the inner end of the tongue 14 will be engaged by the toggle, thereby locking the lip or wing in its position for forming the bond. The look ing of the wing by the toggle also forms a means for preventing the toggle from moving, but when the toggles are struck and caused to move from their transverse position for the purpose of collapsing the core preparatory to its removal from the mold, and so the sides of the core will be released from engagement with the sides of the wall,

that it can accommodate itself to the widths of the core, in other words, it must accommodate itself to the width of the core when collapsed, so that it can be drawn through the opening formed at the top of the wall. It also must accommodate itself or be capable of being moved when the core has been expanded so that it will be centrally located between the ends of the flanges 5, 5 and 6, 6, as shown in Fig. 3 in forming a support for. the bond.

The cores may be of any height, but the dimensions will be somewhat as follows,

especially as to the width of the top and bot tom of the core: The core is preferably four-and-a-half inches wide at the bottom, and four inches wide at the top, and twelve inches high, although the height and width as well as the length, can all be regulated according to the requirements. With a core such as we have shown, we will assume that the dimensions are four inches wide at the top, and fourand-a-half inches at the bottom.

The length can be governed entirely by the wishes of the operator, by merely expanding or contracting the core by drawing the two sections 1 and 2 apart. In Fig. 7 the wings 16 are shown as being swung to a position, so that it rests upon the lower edges of, the sidesof the core. The wings assume this position when the core is used in making the foundation but after the first layer, or foundation, is formed, the wings are swung outwardly, and used as a means fo'rforming a support for the bottom.

From the foregoing,it will'be seen that a core is provided which. can be easily expanded for forming a hollow space in a wall,.and the means carried by. the core will form a support for the formation of the bond, and after the concrete has set, by collapsing the core, it can be withdrawn from the wall without the. necessity of reducing the length of the core.

It will be seen that more or less slight changes might be made in the form and arrangement of the several'parts without departing from the spirit and scope of our invention, and hence we do not wish to limit ourselves to the exact construction herein set forth, but:

We claim:

1. A core for molding, comprising a body, a movable lip carried by the body adapted to be moved to a position for supporting the bond to be formed between two adjoining cores, and means for holding said lip in said position, said holding means adapted to be actuated for releasing the lip from said position whereby the lip will automatically'move to its normal position to allow the core to be removed from the molded wall.

2. A core for molding, comprising collapsible sides, means carried by the sides for supporting the bond to be formed between the two adjoining cores and means for maintaining said means in said position when the core is in its expanded position, and causing it to collapse upon the collapsing of the core.

3. A molding core, comprising a body, a lip pivotally mounted thereon, adapted to be swung outwardly for forming a support for the bond to be formed between two adjacent cores, and means for holding the lip in said position, said lip when out of engagement with said means adapted to be swung to a position so that it will lie beneath the core in the formation of the foundation.

4:- A collapsible core comprising sides, means connecting the sides together for maintaining the sides in the expanded and contracted positions, lips connected to the ends of the cores adapted to be swung to a position for forming a support for the bond to be molded between adjoining cores, and means for connecting said lips to the sides, whereby they will automatically adjust themselves to the width of the core when expanded or contracted.

A collapsible core comprising sides, toggles connected to the sides connecting the sides together, and lips pivotally connected to the sides adapted to be swung to a position for forming a support for the bond to be formed between the adjoining cores, said toggles adapted to engage the lip for maintaining it in its supporting position.

I In testimony whereof we affix our signa tures, in the presence of two witnesses. LYMAN C. STEWART. MARSHALL A. QUINN. Witnesses:

' PAUL W. GREGORY, CARY V. HALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G, 

